1. Amit Chourasia Visualization Scientist Visualization Services Presented at : Florida State University, Nov 20 th 2006 Scientific Visualization of Large Scale Data

2. About SDSC Founded in 1985 through NSF’s supercomputer center Initiative Enable Science and Engineering through computational science and High Performance Computing Current Focus: Data + HEC (High End Computing)

3. Compute Resources at SDSC Machine# ProcsMemoryDiskPeak Perf. Datastar (p-series) 25287 TB112 TB15.6 TFlops Blue-Gene- Data 61441.5 TB19.5 TB17.2 TFlops Teragrid (Itanium2) 5121 TB39 TB3.1 TFlops

4. Storage Resources at SDSC MachineMemoryDiskPeak Perf. HPSS (tape) 256 GB18 PB0.3 TFlops Sam QFS (tape) 288 GB39 TB0.15 TFlops

5. Large? Data? What kind of data? Simulations of earthquakes, CFD, astrophysics, etc Floating point How large? Time varying and multivariate (1000’s of timesteps) Usually 10’s of TB >1024x1024x1024 floats

6. Problems How to verify and validate ? How to analyze ? How to gain scientific insight ? How to share information among experts and non-experts ?

7. Understanding Data Large amount of numbers don’t make much sense to humans Visual information can encode large amount of numbers to gain insight Low Bandwidth High Bandwidth

8. Scientific Visualization Short Def. – is the representation of data graphically as a means of gaining understanding and insight into the data. “Visual Representation and Abstraction of Scientific Data”

9. Seismic - TeraShake Simulation TeraShake 2.1 Comparison of TS1.2 – TS1.3 Short and simple Web Collab: SCEC

10. Seismic - SCEC Viz portal Collab: SCEC

11. Seismic - Puente Hills Simulation Movie Web Collab: SCEC

12. Seismic - Recreation of 1906 San Francisco Earthquake North Bound South Bound Collab: USGS

13. Cancer Center Portal Collab: UCSD

14. Climate Simulation River Flow 3D River Flow Top Collab: UCSD LLNL

15. CFD Simulation Movie Collab: GaTech

16. Enzo – Universe Simulation Matter Density Dark Matter Density Temperature Collab: UCSD LLNL

17. Seismic – 7 Story Building Original video Match Check Match Top Bottom Combined Perspective npr Roof npr Site 3d model Collab: NEES

18. Data Issues Data Formats Data Translation Data transfer and replication between archival and active file systems Data larger than memory available

19. Viz Issues Domain knowledge Multivariate data representation Temporal coherence Precision Loss (compression,etc) Interaction vs batch visualization Perceptual Issues Personal Bias (author & viewer)

20. How do we Visualize Vista (SDSC/NPACI) – Batch Volume renderer Mesh Viewer (SDSC/NPACI) – Interactive Volume Renderer Autodesk’s Maya – 3D animation software Adobe’s suite (After Effects, Photoshop, Illustrator) Other things that work

21. Does Viz work? Collab: SCEC

22. Does Viz work? Collab: SCEC

23. Anisotropy of the cosmic microwave background radiation Image Source: NASA 2006 Nobel Prize in Physics: John C. Mather and George F. Smoot

24. “Information is infinite” Joseph Kielman- Science Advisor, Dept. of Homeland Security Information overload Can’t win Can’t break even Can’t get out of the game Can Visualization help? Think Petascale Data Analysis

25. Thanks for your patience ? - Web: http://visservices.sdsc.edu/ email: amit sdsc.edu http://visservices.sdsc.edu/